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Finding the Fourth Proportional to 18,357.10, 25,331.07 and 12,697.90

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Solution

The fourth proportional to 18,357.10, 25,331.07 and 12,697.90 is: 17,521.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,357.10 : 25,331.07 = 12,697.90 : x
  2. Step 2: Convert to fraction form
    18,357.10/25,331.07 = 12,697.90/x
  3. Step 3: Cross multiply
    18,357.10x = 25,331.07 × 12,697.90
  4. Step 4: Simplify right side
    18,357.10x = 321,651,393.75
  5. Step 5: Solve for x
    x = 321,651,393.75/18,357.10
  6. Step 6: Final answer
    x = 17,521.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.